li{
    font-size: 30px;
    line-height: 50px;
    color: black;
    font-weight: bold;
}
.img_box{
    width: 300px;
    height: 300px;
    background: url(../img/7.jpg);
    background-size: cover;
    z-index: 9999;
}
.img_box1{
    width: 300px;
    height: 300px;
    background: url(../img2/7.jpg);
    background-size: cover;
    z-index: 9999;
}
.boo{
    width: 300px;
    height: 300px;
    margin-top: 10px;
}